UIScreen bounds versus applicationFrame

Question

Why do I see in some sample code from Apple (such as PhotoScroller) that I should do the following in loadView:

CGRect frame = [[UIScreen mainScreen] bounds]; 

instead of

CGRect frame = [[UIScreen mainScreen] applicationFrame]; 

Does it make a difference to get the main screen's frame?

Answer 1

iOS 9 Update

When using the Split View feature on the iPad, applicationFrame returns the size of your app window. bounds always returns the size of the device.